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12 条记录 (耗时 0.028 秒)

    Shaft rub simulator
    2.
    发明授权
    Shaft rub simulator 失效
    轴摩擦模拟器

    公开(公告)号：US5029143A

    公开(公告)日：1991-07-02

    申请号：US654307

    申请日：1976-02-02

    申请人： Howard B. McCracken ,  Robert S. Acks ,  Stanley J. Watson

    发明人： Howard B. McCracken ,  Robert S. Acks ,  Stanley J. Watson

    IPC分类号： G10K15/02

    CPC分类号： G10K15/02 ,  B63G13/02 ,  B63G7/08 ,  B63G9/00

    摘要： A synthesizer for complex acoustic signatures includes a generator for an ectrical analog of a complex acoustic waveform corresponding the the "shaft rub" noise produced by the interaction of a marine propeller shaft and a stern tube or other through-the-hull marine fitting. This circuitry employs digital random generators to produce a nonrecurring characteristic signal synthesizing this acoustic noise. An arrangement to process this signal with other simulation circuitry is also disclosed.

    摘要翻译： 用于复合声学特征的合成器包括一个复合声波波形的电子模拟的发生器，该复合声波对应于由船用螺旋桨轴与船尾管或其他船体海上配件的相互作用产生的“轴摩擦”噪声。 该电路使用数字随机发生器来产生合成这种声学噪声的非复现特征信号。 还公开了用其他仿真电路处理该信号的装置。

    Single-sideband acoustic telemetry
    3.
    发明授权
    Single-sideband acoustic telemetry 失效
    单边带声学遥测

    公开(公告)号：US4418404A

    公开(公告)日：1983-11-29

    申请号：US307403

    申请日：1981-10-01

    申请人： Alan Gordon ,  Stanley J. Watson ,  Steven J. Cowen ,  Gerald Mackelburg ,  Brett D. Castile

    发明人： Alan Gordon ,  Stanley J. Watson ,  Steven J. Cowen ,  Gerald Mackelburg ,  Brett D. Castile

    IPC分类号： H04B1/68 ,  H04B11/00 ,  H04B1/74

    CPC分类号： H04B11/00 ,  H04B1/68

    摘要： An apparatus and method of transmitting and receiving information underwa assure improved performance characteristics. Modulating a carrier and appropriately filtering it allows the transmission of only single sideband signals or a carrier along with single sideband signals to increase the range at reduced power consumption levels. Demodulating incoming signals can be done synchronously (when the carrier is present) or asynchronously (only single sideband signals) to extract the information. When a number of carriers are modulated and, simultaneously, are transmitted and received, the system's reliability is enhanced.

    摘要翻译： 一种在水下发送和接收信息的装置和方法，提高了性能特征。 对载波进行调制并进行适当的滤波，允许仅传输单边带信号或载波以及单边带信号，从而在降低的功耗水平下增加范围。 可以同步（当载波存在时）或异步（只有单边带信号）解调输入信号以提取信息。 当多个载波被调制并且同时发送和接收时，系统的可靠性得到提高。

    Precision doppler effect compensator
    10.
    发明授权
    Precision doppler effect compensator 失效
    精密多普勒效应补偿器

    公开(公告)号：US4905211A

    公开(公告)日：1990-02-27

    申请号：US326951

    申请日：1989-03-22

    申请人： Gerald R. Mackelburg ,  Stanley J. Watson ,  Jayson T. Durham ,  Alan Gordon

    发明人： Gerald R. Mackelburg ,  Stanley J. Watson ,  Jayson T. Durham ,  Alan Gordon

    IPC分类号： H04B11/00

    CPC分类号： H04B11/00 ,  Y10S367/904

    摘要： A precision Doppler effect compensator provides Doppler compensation in astic transmission by simultaneously sending a known reference signal with an information signal. The information signal and reference signal undergo identical Doppler effects. The compensator uses the Doppler shifted reference signal to sample the analog Doppler affected information signal. The analog information signals are digitally converted and stored in a first in first out shift register. The samples are read out of the FIFO at a rate corresponding to the frequency of a non-Doppler shifted reference signal so as to precisely reconstruct the information signal as transmitted. The samples read from the FIFO are reconverted from digital to analog form to be presented to a receiving modem for further information processing.

    摘要翻译： 精密多普勒效应补偿器通过同时发送具有信息信号的已知参考信号来提供声传播中的多普勒补偿。 信息信号和参考信号经历相同的多普勒效应。 补偿器使用多普勒偏移参考信号对模拟多普勒影响的信息信号进行采样。 模拟信息信号被数字转换并存储在先进先出移位寄存器中。 样本以与非多普勒偏移的参考信号的频率相对应的速率从FIFO读出，以便精确地重构所发送的信息信号。 从FIFO读取的样本从数字模式转换为模拟形式，以呈现给接收调制解调器以进一步进行信息处理。